constexpr std::size_t MaxSimdWidth = 32;
- // unique number for each piece type on each square
- enum {
- PS_NONE = 0,
- PS_W_PAWN = 1,
- PS_B_PAWN = 1 * SQUARE_NB + 1,
- PS_W_KNIGHT = 2 * SQUARE_NB + 1,
- PS_B_KNIGHT = 3 * SQUARE_NB + 1,
- PS_W_BISHOP = 4 * SQUARE_NB + 1,
- PS_B_BISHOP = 5 * SQUARE_NB + 1,
- PS_W_ROOK = 6 * SQUARE_NB + 1,
- PS_B_ROOK = 7 * SQUARE_NB + 1,
- PS_W_QUEEN = 8 * SQUARE_NB + 1,
- PS_B_QUEEN = 9 * SQUARE_NB + 1,
- PS_NB = 10 * SQUARE_NB + 1
- };
-
- constexpr uint32_t PieceSquareIndex[COLOR_NB][PIECE_NB] = {
- // convention: W - us, B - them
- // viewed from other side, W and B are reversed
- { PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_NONE, PS_NONE,
- PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_NONE, PS_NONE },
- { PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_NONE, PS_NONE,
- PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_NONE, PS_NONE }
- };
-
// Type of input feature after conversion
using TransformedFeatureType = std::uint8_t;
using IndexType = std::uint32_t;
return result;
}
+ template <typename IntType>
+ inline void write_little_endian(std::ostream& stream, IntType value) {
+
+ std::uint8_t u[sizeof(IntType)];
+ typename std::make_unsigned<IntType>::type v = value;
+
+ std::size_t i = 0;
+ // if constexpr to silence the warning about shift by 8
+ if constexpr (sizeof(IntType) > 1) {
+ for (; i + 1 < sizeof(IntType); ++i) {
+ u[i] = v;
+ v >>= 8;
+ }
+ }
+ u[i] = v;
+
+ stream.write(reinterpret_cast<char*>(u), sizeof(IntType));
+ }
} // namespace Stockfish::Eval::NNUE
#endif // #ifndef NNUE_COMMON_H_INCLUDED